Exhaust-valve for combustion-engines.



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Harter o. LINnnriaNN, or evoca, MINNESOTA.

nHAUsT-vnnvn ron coMBUsrIon-nnernns.

Laatste;

Specification of Letters Patent.`

APatented July 3l, 1917.

application mea my 1, 191e. serial No. 107,134.

To all whom t may' concern.' f

Beit known that I, HENRY C. LINDEMANN,

a citizen of the United States,residin atv Avoca, in the county of Murray and tate of Minnesota, have invented certain new and useful Improvements in Exhaust-Valves for .Combustion-Engines; and I dol hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others 'skilled in the' art to which it appertains to make and use the same. The invention relates to improvements in exhaust valves for combustion engines.

The object of the present invention is to improve the construction of exhaust valves for combustion engines and to provide simple, practical and ecient means for effectually preventing the valves from sticking and thereby eliminating the troubles resulting therefrom such as the burningrout of the valves, a highly heated exhaust pipe, black smoke and the loss of power. f

A further object of the invention is to provide protecting means adapted to exclude the gases and the carbon particles ,carried by the same, from. the valve stem andthe guiding means therefor, whereby the steinv will slide freely at all times in the said guiding means and permit the valve to close securely and properly and to` cause the full force of the charge to act against the piston.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to Y without departing from the spirit or sacrificing any of the advantages ofthe invention.

ln the drawing Figure l is a side elevation of an exhaust valve having guiding'means and a protecting device therefor constructed in accordance with this invention.

Fig. 2 is a longitudinal sectional view of the same the valve stem being in elevation.

Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 2.

Lilie numerals of reference designate corresponding parts of the several iigures of the drawing.

ln the accompanying drawing in which is illustrated the preferred embodiment of the invention, lk designates a puppet or exhaust valve provided with a stem 2 operating in a guide 3 and equipped with a sleeve or cap 4 receiving and forming a guard and cover or shield for the said guide whereby the gases, carbon and the like are excluded from the valve stem and eifectually prevent it from adhering to the same and causing the valve stern to stick in the guide and interfere with a proper operation of 4the valve and the lcorrect feeding of the same. rlhe sleeve or cap Ll/which may be fixed to the valve stem in any desired manner, either by being formed integral therewith, welded thereon or other equivalent means is closed at its inner end or end' nearer the valve l by a head 5 and it is provided with a cylindrical opening 6 which receives the guide 3. The guide 3, which has a transverse disk vor plate at the smaller end of the tapered tubular portion, is provided with a cylindrical bore or opening 7 for guiding the stem 2 of the valve and it is eXteriorly tapered outwardly or away from the valve 1 which provides an intervening space 8 back of the sleeve for causing a draft of air and to assist in preventing accumulation from adhering to the ide. Also the tapered character of the guide forms a relatively sharp edge 9 which will remove any accumulation from the space 8 when the valve is reciprocated. In the reciprocation of the valve the sleeve 1 is of suthcient length to cover always the inner enlarged end of the guide so as to completely protect the guiding means and the adjacent pprtion of the valve stein. The device is adapted to be readily applied to valve Stems and an advantageous operation may be had with the guide of cylindrical form but the greatest advantage will be obtained from the construction disclosed in the drawing.

The tubular projecting portions of the guide or guide proper must be of course of suiiicient length to correspond with the stroke of the valves so that the sleeve of the valve stem will afford a proper protection for the guiding means at all times.

What is claimed is l. The combination with a guide having a tapered tubular portion, a valve provided with a stem slidable through the guide, and a sleeve carried by the stein and closed at one end and having a cylindrical opening litting the larger end of the tapered tubular guide, said tubular guide and sleeve having an intervening annulaire tapered spese between them when the closed eed of ille sleeve is in Contact with the larger end of he tepel-ed tubular portion o' the guide.

2. The combination with a guide iiaving ai tapered tubuiar poi-tien, and povlded a?, the Smalley end thereof with a transverse plate or portion, e Valve having a stem slidable in the guide, and; e sleeve mounted on he seem intermediae of the ends thereof and having a closeci thickened en@ portion' tapeied eXteiier13/,-eeifi sleeve being aisee provided with a cylindrical opening; receiv- Leeegeee the guide and sleeve when the closed end of the lattei is in engagement with the large end of the tapered tubular' portion of the guide.

lin tesimony whereof ex my signature in presence of two Witnesses.

HENRY C. LNDEMANN. iitnesses:

A. Goms? WALKER, 

